Friction can be good.
When we walk we push backwards against the ground,
the opposing
forcepushes us forwards. Withoutfrictionour feet
would slip and walking would be impossible.

It has been shown previously that a
car is movedforwards
by the wheels which try to
turn and push
against the road.
The direction of the forces
for the car wheels and the road
are the same
as the forces above for a man walking.Without friction a carcould notmove
forwards, be steered or
be stopped.

There are many examples wherefriction is a necessary force in the world in which we live.